I just finished reading Kadena.io’s chainweb white paper regarding a blockchain comprised of “chains of chains”, or as in the term which I quite like: Chainrope. It is a very clear read and fascinating in it’s implications. Essentially they are proposing a solution to massively scaled public blockchains through the use of a network of “chains of chains” where the block-headers from multiple chains are included in other chains in such a way that it creates a kind of a 3D Merkel tree, or Merkel Cone.